Yes, there were some very interesting studies on the impacts on children in school buses, because of course they're mostly run on diesel fuel. And the children were achieving these very high rates of exposure to the fine particulates.
Do you think this bill should recognize the need to protect vulnerable groups in our society too? Adults stand higher on the ground. They use less oxygen per unit of body mass. They process in a different fashion from children. So the children are really quite vulnerable on our streets right now to these types of pollutions.
I'll get you to comment on that.